package Day27;

import java.math.BigInteger;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        while (in.hasNextLong()) {

            BigInteger a = in.nextBigInteger();
            BigInteger b = in.nextBigInteger();
            BigInteger c = in.nextBigInteger();


            if (a.compareTo(b) > 0) {
                BigInteger tmp = a;
                a = b;
                b = tmp;
            }
            if (a.compareTo(c) > 0) {
                BigInteger tmp = a;
                a = c;
                c = tmp;
            }
            if (b.compareTo(c) > 0) {
                BigInteger tmp = b;
                b = c;
                c = tmp;
            }

            if (a.add(b).compareTo(c) > 0) {
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        }
    }
}
